* {
    padding: 0;
    margin: 0;
}

body{
    background-color: rgba(255,192,203,0.3);
}

#box {
    margin: 200px auto;
    width: 784px;
    height: 270px;

}

#smallBox,
#bigBox {
    float: left;
}

#smallBox {
    height: 270px;
    width: 480px;
    position: relative;
    margin-right: 30px;
    border: 1px solid rgb(255, 173, 186);
}

#mask {
    height: 50px;
    width: 50px;
    background-color: rgba(224, 43, 11, 0.5);
    position: absolute;
}

#smallBox img {
    height: 270px;
    width: 480px;
}

#bigBox {
    height: 270px;
    width: 270px;
    border: 1px solid rgb(255, 173, 186);
    display: none;
    overflow: hidden;
    position: relative;
}

#bigBox #bigImage {
    position: absolute;
    height: 1458px;
    margin-top: 2px;
}